Fountain pen



FIG. 1 is a front elevational view of a fountain pen showing my newdesign;

FIG. 2 is a side elevational view thereof, the side opposite beingsubstantially a mirror image;

FIG. 3 is a bottom perspective view thereof; and

FIG. 4 is a top plan view thereof.

The ornamental design for a fountain pen, substantially as shown anddescribed.